Ventilating fan



Oct. 17, 1933.

E. B. FRYEEMAN- VENTILATING FAN Filed July 9, 1928 ?atented 9ct. l?,19133 raam Leanser vENmA'rrNG FAN Ernest B. Freeman, Newton, Mass.,assignor to B. F. Sturtevant Company, Hyde Park, Mass., a corporation ofMassachusetts Application July 9, 1928.

\ 4 Claims.

The present invention relates to Ventilating fans and more particularlyto an electric motor driven Ventilating fan of the propeller type,mounted for bodily reversal so that the current of air will bedischarged in either one of a number of directions at the option of theoperator.

The object of the present invention is to provide an electric motordriven propeller fan which is adapted to be positioned angularly todirect a stream of air in one or another of several directions at thewill of the operator.

A further object-of the present invention is to provide a Ventilatingfan which shall be compact, of simple construction, and particularlyadapted for use in the Ventilating of rooms or spaces where provisionmust be made both for supplying fresh air to the room and for exhaustingthe air from the room.

A still further object of the present invention is to provide a Wallventilator which may be placed in an aperture in a wall or partition andwhich may be closed tight, or which when the aperture is opened may beemployed to force air from the outside into the room or from the room tothe outside, as conditions require.

With these objects in View the present invention consists in theVentilating fan and associated parts herein shown and described and moreparticularly defined in the appended claims. y

In the accompanying drawing which illustrates 'the preferred form of thepresent invention as embodied in a wallventilating set, Fig.

' l is a vertical sectional View showing the vunit mounted in an openingin a wall, with the closure or shutter shown in full lines in its closedposition and in dotted lines in its open position; Fig. 2 is an endelevation of a portion of the unit looking from the right of Fig. l, andFig. 3 is a side elevation of a detail.

`Mounted in an opening in the wall 4 is the thimble 8 having a flange 8over-lapping the wall 4 and carrying the clamping bolts l0 and nuts 12.The thimble is provided at diametrically opposite top and bottom withthe vertical bearings 14 having the caps 16. As shown in Fig. 2, thethimble is diametrically enlarged adjacent the bearings as shown at 18,-Fig. 2, to provide clearance for the bowed swinging motor casing 20,which is mounted in the bearings 14.

The motor casing 20 comprises two vertical arms integrally formed withthe main portion 22, the upper arm being hollow to receive the electricconductor 24 and being provided with having the bearing hub 26. Thelower arm is solid Serial No. 291,216

(Cl. 230--2Z3) and has a bearing hub 28 bored to receive the stem 30 ofthe reversing knob or handle 32. The stem and hub are secured togetherby means of the lock pin 34 and the smaller pin 36 passing therethrough.

The propeller fan comprises the blades 38 mounted upon the fiat ring orannulus 40 supported from the hub 42 by the curved spokes 44.

The hub of the ian is secured upon the end of the rotor shaft 46 of themotor, which in the drawing is illustrated as a direct current motor,

a commutator 48 and the brush holders The fan construction is such, itwill be noted, that the medial plane of rotation of the fan blades andof the rotor lies midway between the ends ci the motor shaft and in theaxis oi the bearings 14 for themotor frame.

As a result,

the position of the fan and motor is in no Way changed whether the partsbe adjusted as shown in full outline inig. 1 'to cause the air to flowin one direction, say, outwardly through the Wall opening, or whether itbe set in the position indicated in dotted lines to cause the air ltoilow inwardly. Thus the minimum space is required by fan and motor sincethe projection of either fan or motor beyond the end of the thimble isthe same for either adjustment of the apparatus.

The motor casing is securely held in the desired adjusted position bymeans oi the lock pin 34, the projecting ends of which are adapted to bereceived in the notches 52 formed by beveling the adjacent shoulders ofthe lower bearing 14 and bearing cap 16. Provision is made for a slightvertical movement of the casing 22 in the bearings 14 so that the lockpin 34 may be disengaged from the notches 52 by pressing upwardly on thereversing knob 32.

The casing may then be rotated, swinging the parts through V180 degreesand upon releasing the knob the pin will again engage the notches 52.

The

weight of the parts is such as to preclude any possibility of accidentalswinging of the motor casing in its bearings.

`i'or convenience to the adjusted.

In order to close the thirnble opening when the fan is not in use ashutter has been provided of `circular form and movable lengthwise ofthe motor axis.

In Fig. 1, this shutter is shown in full line in closed position, itsopen position being indicated in broken line. It comprises a hollow,mushroom-like structure formed of thin sheet metal with dished outerwall 58 and curved inner Wall 60 united at their margins. The inner Wall60 is fixed upon the hub 62, adapted to slide upon the fixed shaft 64carried' by the spider 66 projecting inwardly from the iianged frame 68.The clamping bolts 10 clamp this frame securely against the outer faceof the wall 4 with an intermediate sleeve or section '70 of thin metalconnecting such frame and ythe thimble.

The shutter is actuated by means of the knoby 72 secured upon the outerend of the rod '74 mounted to slide in bearing '76 carried by thethimble 6. An arm 78 connects the rod '74 with the lower end of theshifting lever '78 pivoted at 80 upon the bracket 82 carried by theframe 68. The upper end of the lever 78 is forked and carries pins 84rwhich enter the groove 86 in the end of the hub 62.

Thus it will be obvious that when the actuating knob 72 is pulled by theoperator, the shutter will be moved from the full line position to thedotted position to provide an annular opening between the margin of theshutter and the frame for the flow oi air inwardly or outwardly as thecase may be. The frame 68 is tapered as shown so that the shutter willmake a tight joint when in closed position. Also, the top of the frameis given a slight overhang as shown in Fig. l, to prevent entrance ofthe rain.

In operation, the motor will be controlled from a switch at someconvenient point. When the fan is not in use the shutter may be closedor, if desired, may be left open to any degree extent to provide someventilation. When, however, the fari is to be operated, the shutter willbe opened wide and the fan casing will be adjusted by swinging about thevertical pivots to causa the fan to force air outwardly or to draw freshair in as desired.

The action of the fan may be reversed, and While the fan is in operationif desired, by merely pressing upwardly on the reversing knob, turningthe knob to the limit of its movement in the free direction, and thenreleasing the knob.

While the present invention has been illustrated in a Ventilating unitespecially designed for mounting in an opening in a wall or partition,it is not necessarily limited to such construction and use, but may beembodied in other ange adjacent one end thereof for engagement with theface of the wall and at the other end a pair of diametrically oppositebearings, a swinging, bowed casing pivotally mounted at its ends in saidbearings and carrying at its middle a motor, the thimble being providedwith separated, diametrically disposed enlarged portions adjacent thebearings to provide clearance for the casing, and a fan mounted on themotor and driven thereby. y

2. A fan comprising a fixed support provided with a vertical bearing, aswinging casing pivotally mounted in the bearing and having provisionfor limited longitudinal movement therein, a handle located beneath thebearing and rigidly connected to the casing for raising and .turning thecasing, the casing and support having cooperating projection and recessadapted to be disengaged when the frame is raised and to be engaged whenthe frame is lowered to hold the casing in adjusted position,.and amotor and fan carried by the casing.

3. A fan comprising a motor having a Acasing with rounded ends, a rotor,and a shaft projecting beyond one end of the casing, curved armsextending from the other end of the casing for supporting the motor, ahub xed upon thc end of the shaft and having a `rounded end, a fancomprising a cylindrical base surrounding the casing, blades mounted onthe base, and spokes ERNEST B. FREEMAN.

